Here we are with the story of the third most common element on earth coming from nature to our wrists.
Aluminum, atomic number 13, is the third most common element in nature after oxygen and silicon. With its thin oxide layer on its surface, it has found its place in various fields of industry with its high resistance to corrosion, high strength values , and lightness of its alloys, and has made a positive contribution to the economy with its recyclability.
Although the use of aluminum in the watch industry, which is frequently used in many categories, from aerospace to medical, is much smaller than in general, several manufacturers have introduced models from this handy material.
Two features attract attention as soon as you see a watch with an aluminum case: lightness and cold, grayish surface. The core mass of aluminum is 2.7 gr / cm3. Stainless steel for comparison is about 7.9 g / cm 3 and gold is 19.3 g / cm 3. In short, the stainless steel version of the same watch will weigh almost 3 times more compared to its aluminum version. Since aluminum is an active metal, it reacts instantly with oxygen in the air and forms a thin film on its surface. This layer is formed in a controlled manner in the laboratory and homogeneously dispersed and colored. This layer deforms over time and color and texture irregularities begin to appear on the surface of the aluminum. Moreover, this amphoteric, i.e. the structure that reacts with both acid and base can become vulnerable to sweat due to the watch being worn on the wrist. Therefore, aluminum watches are prone to getting in reaction with the acid in sweat and lose their brand new perfection. Finally, aluminum is relatively soft and easy to process metal. It is also prone to scratches due to its soft structure.
Enough with the chemistry. Now let's take a look at the watchmaking industry.
Although the options are few, it is possible to find aluminum watches for almost any budget. Swatch has been using aluminum cases in some of its Irony series models. These watches stand out with their lightweight and comfort, compared to their stainless steel versions.
When we raise the price range slightly, we see the American origin manufacturer Hamilton. The Khaki Aviation Pilot Pioneer Aluminum promises maximum comfort on the wrist with its 41mm case. Since Hamilton uses PVD coating in this model, it will more likely preserve its new condition for a long time.
Apple, the champion of recent years, offers the option of an aluminum case in the smartwatch series. With a choice of 38mm and 42mm cases, the Apple Watch offers a smartwatch experience with unmatched comfort and quality.
When we raise the bar more, we see the Panerai Composite series, which is renowned for its original design. Coating the aluminum cases with a brown oxide layer, the brand promises both lightness, and unrivaled durability.
Next is the F.P. Journe, the rising star of independent watchmaking, and its Centigraphe Sport model. The model, produced between 2011 and 2014, has an unbelievable weight value of 55 grams with its aluminum case and bracelet. Let me add that the movement inside is also made of aluminum.
